/**
 * 
 */
package net.mikoo.seals.boss.web.controller;

import java.awt.image.BufferedImage;

import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

import com.google.code.kaptcha.Constants;
import com.google.code.kaptcha.Producer;

import net.mikoo.seals.boss.common.BaseController;

/**
 * @author huangxm
 * 
 */
@Controller
public class KaptchaController extends BaseController{
	@Autowired
	private Producer captchaProducer;

	
	@RequestMapping("/kaptcha")
	public void kaptcha(HttpServletRequest request,
			HttpServletResponse response) throws Exception {
		response.setDateHeader("Expires", 0);
		response.setHeader("Cache-Control","no-store, no-cache, must-revalidate");
		response.addHeader("Cache-Control", "post-check=0, pre-check=0");
		response.setHeader("Pragma", "no-cache");
		response.setContentType("image/jpeg");
		String capText = captchaProducer.createText();
		request.getSession().setAttribute(Constants.KAPTCHA_SESSION_KEY,capText);
		BufferedImage bi = captchaProducer.createImage(capText);

		ServletOutputStream out = response.getOutputStream();
		ImageIO.write(bi, "jpg", out);

		try {
			out.flush();
		} finally {
			out.close();
		}
	}
	
}
